Water filter



FIG. 1: top view;

FIG. 2: bottom view;

FIG. 3: front elevational view;

FIG. 4: rear elevational view;

FIG. 5: right side elevational view;

FIG. 6: left side elevational view; and,

FIG. 7: perspective view.

The ornamental design for a water filter, as shown and described.